Retired, needed Radiology test. Insurance requires copays. The company said I had balance, could not give service unless arrangements made.

My insurance requires co-pays only. No balance billing. The only arrangement they would make was pre-dated checks to cover over $200.00 balance. I needed the service, so I gave them checks at $25.00 a month to cover the balance. I asked for statement showing charges. They researched and sent to me. The charges only covered 2 co pays. The rest was balance due based on insurance balances paid, I asked to be billed but they refused.I should not have written the checks but did so to receive needed service. Meanwhile, my bank account was hacked and compromised. I called them to inform them of the situation. I offered to set them up on bill pay generated at the bank site. They have said no, I must present a credit or debit card or replace the checks with new ones, from the new account, or allow them to debit the account directly. My bank has advised me that this is not a good solution, and I am caught in the middle. How do I correct this error in judgement?